METHOD FOR NONDESTRUCTIVE INSPECTION OF CARRYING CAPACITY OF SINGLE-FLIGHT REINFORCED CONCRETE BEAMS

FIELD: construction.SUBSTANCE: invention relates to nondestructive control of bearing capacity of single-flight reinforced-concrete girders at criteria strength reinforcement and concrete. On inspected areas with highest beam concrete deformations of operating load and in these places set meters def...

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Hauptverfasser: SOLOVEV SERGEJ ALEKSANDROVICH, KABEROVA ANASTASIJA ANDREEVNA, UTKIN VLADIMIR SERGEEVICH
Format: Patent
Sprache:eng ; rus
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Zusammenfassung:FIELD: construction.SUBSTANCE: invention relates to nondestructive control of bearing capacity of single-flight reinforced-concrete girders at criteria strength reinforcement and concrete. On inspected areas with highest beam concrete deformations of operating load and in these places set meters deformations. Reinforced concrete girder is then loaded with test load. Method includes determining value of relative deformation separately for concrete and reinforced concrete reinforcement beams. For each stage of test load average value of relative deformation separately for concrete and reinforced concrete reinforcement beams. For each stage of test load separately for concrete and reinforced concrete steel reinforcement beam calculating mean-square deviation of relative deformation. Using prior information, determining average value of maximum relative deformation separately for concrete and reinforced concrete reinforcement beams. Determining upper limiting load valueand lower limit value loadfor concrete and reinforced concrete reinforcement beams. Maximum carrying capacity of concrete beam is determined by least pair obtained for concrete and reinforced concrete girder fitting values of limit loadsand. Values of maximum bearing capacity of reinforced concrete girder theoretically calculated value of maximum bending momentsand, which can be reinforced concrete girder. Finding theoretical dependence of bending moment Mof load acting on reinforced concrete girder. From equations of moments ofandare upper limit value of load on reinforced concrete girderand lower limit value of load on reinforced concrete girder.EFFECT: higher safety of tests of reinforced concrete structures and high accuracy of determining bearing capacity of reinforced concrete structures.1 cl, 4 dwg Изобретение относится к неразрушающему контролю несущей способности однопролетных железобетонных балок по критериям прочности арматуры и бетона. Сущность: на контролируемой железобетонной балке определяют места с наибольшими деформациями от эксплуатационной нагрузки и в этих местах устанавливают измерители деформаций. Затем нагружают железобетонную балку пробной нагрузкой. Определяют величину относительной деформации по отдельности для бетона и для арматуры железобетонной балки. Для каждой ступени пробной нагрузки определяют среднее значение относительной деформации по отдельности для бетона и для арматуры железобетонной балки. Также для каждой ступени пробной нагрузки по отдельности для бетона